Karl viktor btjdin



K. V. RUDIN.

SIEP-BY-STEP MECHANlSM IN CALCULATING MACHINES.

APPLICATION FILED MAR- 18. 1918- 1,312,002. Patented Aug. 5,1919.

KARL VIKTOR RUBIN, OF STOCKHOLM, SWEDEN.

STEP-BY-STEP MECHANISM IN CALCULATING-MACHINES.

Specification 01 Letters Patent.

Patented Aug. 5, 1919.

' Application filed March 18, 1918. Serial No. 223,232.

To all whom it may concern:

Be it known that I, KARL VIKTOR RUDIN, correspondent, subject of the King of Sweden, residing at Karduansmakaregatan 12, Stockholm, Sweden, have invented certain new and useful Improvements in Step by Step Mechanisms in Calculating- Machines, of which the followlng 1s a specification.

My invention relates to improvements in step-by-step mechanisms in calculating machines of that kind, wherein a usual locking-device for the movement of the sllding carriage is provided. Said lockmg-devme consists of a member, arranged on the carriage and movable up and down in a vertical plane, said member normally engaglng in a horizontal row of grooves or notches in the frame of the machine.

In these machines the locking device can be actuated by hand and, at the same time is in any known way actuated by'two rojections or the like, arranged on the sh 1 ng carriage, which projections also engage with a toothed bar or the like.

Machines of that type have been described in U. S. Patent No. 967,821.

My invention is essentially character zed thereby that each of the said pro ections consists of two parts pivotally connected with each other and movable in the vertical plane, of which the one art is intended to be caused to enga e Wit the toothed bar, when actuated in t e said way.

An embodiment of my invention is illustrated in the accompanying drawing, where- Figure 1 is a front view of a part of the sliding carriage, whereb the casing is partly broken away, in norma or rest ng os1t1on.

Fig. 2 shows the same but with t e parts in that position,,wherein the carriage just been moved one step to the rlght, while Fig. 3 is a vertical section of Fig. 1.

Fig. 4 is a detail plan, showm a portion of the frame'provided with t e series of notches 22 and also showingbne of the members 4 engaged in one of said notches.

1 designates the casing of the slidlng carriage. 2, 7 and 3, 8 designate the two projections, serving for the step-by-step movement of the sliding carriage to the r1 ht or to the left, said projections, of whic 2, 7 are intended to be actuated when moving the carriage to the right, and 3, 8 when moving same to the left, engaging in known way in a member 4, movably up and down in a vertical plane and engaging as usual a horizontal row of grooves, notches or the like 22 on the frame of the machine. The projections 2, 7 respectively 3, 8 are journaled on the sliding-carriage, preferably on plates or disks arranged on the same. Grooves or notches 9 respectively 10 are provided on the projections, suitably on the parts 7, 8 whereby said grooves are intended to catch the member 4: in order to move the same downward.

The projections 2, 7 respectively 3, 8 are actuated by springs, whereby each of the two parts constituting one projection may be actuated by a spring or by a common spring. In the embodiment shown on the drawin the parts 2, 7 respectively 3, 8 are actuate each by a spring 16, 12'respectively 17, 13. The said springs serve to move the projections back to their normal position. The movements of the projections are hereby limited by pins 14, respectivel 15, 21, which suitably lie in the way of t e part 2 res ctively 3.

here are further in a suitable place on the sliding earria e arranged projections 18, 19, which lie in t e way for the projecting parts 7 respectively 8, which in their turn serve to lock the sameby means of one of the teeth on the bar 11, when the slidingcarriage has been moved one step.

The function of the device is as follows:

If for instance the carriage is to be moved one step to the right (Fig. 1 or 2), the projection 2 is actuated by hand and moved in the position, shown in Fig. 2. The projection 7 is hereby moved downward and the notch 9 is caused to catch the vertically movable member 4, so as to move the outer end of said member downward and to release its inner end, engaging with the usual horizontal row of grooves or notches, wherebythe carriage is permitted to move. The

carriage is thus under the pressure of the hand on the Meanwhile t e member 7 has been moved downward so long a way that the lower end of the same catches the space between the teeth, being below. Hereby the en geme'nt of the member 4 with the part 7 1s repart 2 moved toward the right.

leased and the inner end of the member 4 is the pressure on the part 2 is too strong the parts 4 and 'l are caused to ump over or to slide over more than one tooth on the bar and thus causing the carriage to move more over the tooth and full security will be obtained for that the carriage 'will not be moved more than one step at the time.

It may be remarked that the embodiment shown upon the drawing is taken only as an example and that the device may be modified in several ways.

I claim 2-- y 1. A step-by-step mechanism in calculating machines including a framework provided with a horizontal row of notches, a sliding carriage capable of step-by-step movement, a locking device therefor including a member arranged upon the carriage, such member being movable in a vertical plane and normally engaging said notches on the frameworkof the machine, a pair of projections arranged on the sliding carriage, a toothed bar, such projections being adapted to engage therewith, each projection comprising two parts pivotally connected with each other, movable in avertical lane, one of said parts being intended to becaused to engage with the toothed bar when actuated. g

2. A step-by-step mechanism in calculating machines including a framework provided with a horizontal row of'notches, a a

sliding carriage capable of step-by-step movement, a locking device therefor including a member arranged u on the carriage, such member being mova 1e in a. vertical plane and normally engaging said notches on the framework of the machine, a pair 0t projections arranged on the sliding carrlage, a toothed bar, such rojections being adapted to engage therewith, each projection comprising two parts pivotally connected with each other, movable in a vertical plane, one of said parts being intended to be caused to engage with the toothed bar when actuated, and springs having one of their ends secured to the framework, the opposite ends being secured tothe projection for normally withdrawing such projoection out of engagement with the toothed 3. A step-by-step mechanism in calculating machines including a framework provided with a horizontal row of notches, a sliding carriage capable of step-b -step movement, a locking device there or including a member arranged upon the carriage, such member being movable in a vertical plane and normally engaging .said

notches on the framework of the machine,

a pair of projections arranged on the sliding carriage, a toothed bar, such projections being adapted to engage therewith, each projection comprising two parts pivotally connected with each other, movable in a vertical plane, one of said parts being intended to be caused vto engage with the toothed bar when actuated, and stops secured to such carriage for preventing too great a movement of the projections so as to prevent their sliding over more than one notch at each actuation. I

In testimon whereof I afiiir my'signature in presence 0 two witnesses. I

Witnesses:

Fnrrz E. HALLIN, JACOB Bases,

KARL VIKTOR R BIN. 

